CH880/H8800 Eccentric Bushing 442.9360 cone crusher Parts

Technical Specifications: CH880 / H8800 Eccentric Bushing

The Eccentric Bushing (Item Code: 442.9360) is the kinematic interface of the Sandvik CH880 (formerly H8800) cone crusher.
Weighing 592kg, this massive bronze component acts as the primary journal bearing for the main shaft, translating the rotational energy of the eccentric assembly into the gyratory crushing force.
Failure to maintain the hydrodynamic oil wedge in this component results in immediate contact between the main shaft and the eccentric, leading to catastrophic machine failure.

Core Advantages: Metallurgy & Manufacturing

In the domain of heavy-duty crusher spares, the manufacturing process defines performance.
For a 592kg high-leaded bronze part, standard gravity casting is insufficient.

The Critical Role of Centrifugal Casting

We manufacture the 442.9360 bushing exclusively via Centrifugal Casting.
In static casting, the heavy lead (Pb) content tends to sink to the bottom of the mold (gravity segregation), creating a bushing with uneven lubricity.
By spinning the mold at high RPM during solidification, we achieve:

• Homogeneous Lead Dispersion: The lead is locked into the copper matrix as microscopic, uniformly distributed globules. This ensures consistent self-lubrication across the entire 592kg mass.
• structural Density: Impurities and gas porosity are forced to the inner bore (which is machined away), resulting in a defect-free, dense bronze structure capable of withstanding the immense crushing pressure of the CH880.

Performance Comparison: Service Life Analysis

Field data from copper and iron ore mines utilizing the H8800 demonstrates the clear advantage of centrifugal bronze.

Field Diagnostic & Maintenance Tips

As experienced crusher part suppliers, we recommend the following diagnostic routine for the CH880:

1.
Oil Analysis (The Lead Warning):

Regularly analyze the return oil.
A gradual rise in Copper (Cu) and Lead (Pb) is normal wear.
However, a sudden spike in Lead without a corresponding rise in Copper indicates “Lead Sweat.”
This means the bushing is operating above 130°C locally, causing the lead to bleed out, usually due to insufficient oil flow or cooler failure.

2.
“Burnishing” vs. “Scoring”:

During inspection, the inner surface should look dull matte bronze.
If you see bright, mirror-like patches (“burnishing”), the clearance is too tight.
If you see deep vertical scratches (“scoring”), contaminants have bypassed the dust seal.
Immediate oil filtration check is required.

Related CH880 / H8800 Spare Parts Inventory

We supply the complete suite of wear and spare components for the Sandvik 8000 series, fully interchangeable with OEM specifications.

Frequently Asked Questions (FAQ)

Q1: Is this bushing compatible with both the older H8800 and the newer CH880?

A: Yes.
The item code 442.9360 is the standard eccentric bushing for the Sandvik Hydrocone H8800 and the CH880.
However, always verify your specific machine’s serial number, as some “vintage” models may have slight variations in the oil groove pattern.

Q2: Why is the weight listed as 592kg?

A: The CH880 is a large primary/secondary crusher.
The eccentric bushing is a massive component designed to handle hundreds of tons of crushing force.
Lighter bushings (e.g., 120kg) belong to smaller series like the CH440 and will not fit the CH880.

Q3: What lubricant should be used with this bronze bushing?

A: We recommend adhering strictly to the OEM viscosity specification, typically ISO VG 150 or 220 depending on the climate.
Using oil that is too thin will fail to maintain the hydrodynamic wedge, leading to rapid wear.